Motion transmitting device



3 Sheets-Sheet 1 E. A. SPRIGG MOTION TRANSMITTING DEVICE Filed May 19,1945 Sept. 16, 1952 v I N V EN TOR.

Edward 4. dp

III/[III BY /%Zmvag% ATTORNEYS Sept. 16, 1952 E. A. SPRIGG 2,610,525

MOTION TRANSMITTING DEVICE Filed May 19, 1945 s Sheets-Sheet? INVEN TOR.

Sept. 16, 1952 E. A. SPRIGG MOTION TRANSMITTING DEVICE Filed May 19,1945 3 Sheets-Sheet 3 INV'NTOR. fdWa/"d 4. 5 m

AT TORNEYS Patented Sept. 16, 1952 Edward A.1Sprigg, Toledo, Ohio,assignor to 'H."H.

Buggie & Company, Toledo, Ohio, a'corporation of Ohio Application May19, 1945; Serial No. 594,754 I 1 v This-invention provides means fortransmitting motion to mechanism inside a closed housing. 7 It is oftendesirable that mechanism. be operated. in anatmosphere or under pressureconditions-thatcan be maintained only if the mechanism is housed in-afluid-tight casing. Certain electrical apparatus for example must, in;order to function properly, be operated within a partial vacuum. Somerefrigerating apparatus .must be: located within a chamber containingvolatile liquid. Otherdev-ices are. required to function within inertgases, and still ,others; in atmospheres which-must-be closely confined.Such conditions require that the mechanism be enolosed in a fluid-tighthousing, and where .the mechanism-is operated froman outside source ofpowerit-is often diflicult totransmit the power from the outside to theinside of the housing without risk of leakage,xwhioh would destroy thevacuum or permit the escape or contamination of the confined fluid. ,Insome appliances, such. for example .as Washing machines, it is importantthat. power be transmitted through a leakproof bottom of a tuber othercontainer.

. vIt is a general object of this, inventionto.pro-

vide means mechanically to transmit movement through animperforatemembrane.

- A.Ill0l6 specific object is to provide simple mechanical means for.transmitting movement or i power from the exterior to the interior, orvice versa, of .a completely closed housing. This object isaccomplishedby causing movement of a driving member to be transmitted to a driven.ordinated that as the driving elements roll over one side of themembrane the driven elements are caused to roll over the membranesopposite side.

iOther objects and advantages will be apparent from the followingdescription, reference being had to the accompanying drawings in whichseveral embodiments of the invention are illustrated soythat theprincipleinvolved may be clearly understood, similarreference numeralsbeing used to designate similar parts throughout the several views.

. In the drawings:

Fig. I is a fragmentary front elevational-view. with'a part :broken awayand a part shown in section, illustrating a device incorporating oneform of the invention;

Fig. II. is an enlarged fragmentary vertical sectionalview showing someof the mechanism illustrated in Fig. I;

Fig. III is a fragmentary view with a shaft in '19 Claims. (01.74-4540)section, takenfrom' the position-indicated by the broken lineIII-IIIofFig. II;

. Fig. IV is a similar fragmentary elevational viewwith a shaft insection, taken from the position indicated by the broken line.IV--.IV ofFig. II;- v

Fig. V is afragmentary sectional plan view taken from the positionindicated by the broken .line VV of Fig. VI;

Fig. VI is a View, partly in elevation and partly in vertical section,showing a modified arrangement of the mechanism of the invention, partsbeing broken outto shortenlthefigure; v

Fig. VII. is a fragmentary vertical sectional view illustrating anotherform of the. invention;

Fig, ,VIII is a fragmentary sectional view taken on the line VIIIVIII ofFig. VII;

Fig... LXis a fragmentary sectional view't'aken on the line IX-IX ofFig. VII; Fig. Xfis a fragmentary front elevational view, with partsinsection, showing a modificationof the form ofthe invention illustratedinFig. I.;

' Fig. XI is a fragmentary. front elevational view, with parts insection, .showingstill another form of the invention; I

Fig. XII is a fragmentary sectional plan view taken on the line XIIXIIof Fig.v XI; and

Fig. XIII is a fragmentary front. elevational view, with a membrane insection, showing a modification of a form of the invention illustrated.in

. Refer now tothe drawings'in detailandparticularly to Figs. I, II, IIIand IV thereof.

The mechanism is mounted upon a base I, a horizcntaldriving shaft 2being journaled in a bushing 3 which is inserted in the upper end of astandard 14. Fixed upon the shaft 2 is a spider 5having-oppositelyextending arms '5 and 1 upon which freely rotatablefrusto-con-ical rollers 8 and 9 are mounted by means of screws l0 andball bearings II. A ballthrust bearing I2 is interposed between the hubof the spider 5 and the standard 4, and a pulley I3 is fixed upon theend of the shaft 2 which extends beyond the standard 4, the pulley beingadapted to be driven by a belt M.

-Themechanism so far described is'located exteriorly of a housing l5which is supported upon the base I. standard I.6;anda shaft [1 isjournaled in a bushing I8 which ismounted in. the upper end .of :thestandard 1.6, theshaft ll being axially aligned withthe shaft. 2. Fixedupon the shaft I7 is a spider t9nhaving four arms 20, 21', 22 and 23upon which freely rotatable frusto-conical rollers '24,

25, 2.6 andZl are mounted by means of screws and ball bearings likethose by means of. which the rollers 8 and 9 are mounted. A ball thrustbearing 28 is. interposed between the hub of the spider lfl'and thestandard It, and the shaft .11

Within the housing 15 is locateda 24a pressing against the lower side ofthe mem- -.'brane, the exterior and interior rollers being intermeshedso that when the cylinder 30a is turned and the membrane is revolvedbetween the rollers the interior rollers are prevented from movingbodily around with the membrane and the shaft 'l'la' is held stationaryWhile the cylinder 30a re- 24, 25, 2s and 2? pressing against. themembrane from the inside, the exterior and interior rollers beingintermeshed so that when the exterior shaft 2 is turned in a clockwisedirection (as seen in Fig. IV) the depressions in the membrane 29 causedby the pressure of the rollers 8 and 9 move with a wave-like motion,pushing against the interior rollers 24 and 26 and causing theseinterior rollers to roll aheadof the rollers 8 and 9 in a circular pathover the inside surface of the membrane. As the interior rollers 24 and26 move around this circularpath they act through the spider l9 andshaft II to turn the mechanism (not shown) within the housing l5. Thus,while no mechanism extends through the membrane, motion nevertheless istransmitted from mechanism on one side of the membrane to mechanismon'the other side. I

If the exterior shaft 2 were to turn counterclockwise, the exteriorrollers 8 and 3 would act through the membrane 29 upon the interiorrollers 25 and 27, causing them to roll around a circular path ontheinner surface of the membrane 29 to turn the inner shaft I!counterclockwise. Q

Instead of constructing the device with the tworoller spider outside andthe four-roller spider l9 inside, this arrangement could be reversed;that is to say, the four-roller spider could be used as the driving.spider and the two-roller spider could be usedas the driven spider. v

The device would be operative if one of the arms I of the exteriorspider with its roller 9 and one correspondingpair of arms 22 and 23 ofthe interior spider with the coacting rollers 26 and 21 were omitted,but the two-arm exterior spider and the four-arm interior spider aremore efficient because, since they are symmetrical, bending forces andside thrusts which otherwise would be transmitted to the shafts 2 and I!are counteracted. 7

Each of the spiders mayyif desired, be equipped with more rollersproperly spaced and proportioned to constitute a se'riesof rollers oneach spider, the two series intermeshing with each other through'themembrane. This arrangement is illustrated in Fig. V and is used inthedevice illustrated in Fig. VI, which shows an upright rotary cylinder30o carrying a ring gear 3m which is driven by a pinion 32a fixed to arotating horizontal shaft 33a journaled in a bracket 4a. A verticalshaft 2a is fixed in the upper arm of the bracket 4a and carries aspider 5a upon which are mounted a series of freely rotatablefrustoconical rollers Err-8a. Located within the cylinder' 38a andjournaled in a bracket lBa is a shaft Ila which has a spider [9a fixedupon its upper end, a series of frusto-conical rollers Mel-24a, beingmounted upon the spider No. A ballthrust bearing 28a is interposedbetween the hub of the spider lila and the bracket lfia, and the lowerend of the shaft is journaled in a socket in the bottom of the cylinder30a;

A flexible membrane 29a, having a fluid-tight juncture with the top ofthe cylinder 36a, lies between the exterior spider 5a and the interiorspider l9a with the rollers 8a pressing against the upper side of themembrane and the rollers volves. Any desired mechanism within thecylindr may be operated by the relative motion of the cylinder and theinterior spider l9a.

Figs. VII, VIII and IX illustrate a form of the invention in which themembrane, instead of being disk-like, is an annular band.

In the device illustrated in Figs. VII, VIII and IX, a non-rotatableshaft 21) is fixed in the upper end of an exterior bracket 4b. Rotatablymounted upon the shaft 21 is a bushing 31) that is fitted into a spider52) having horizontally extending arms 6b and lb upon whichcylindrically shaped rollers 81) and 9b are mounted bymeansof'shouldered screws Hlb. I Apulley I3!) is formed upon or attached tothe spider 5b and adapted to be turned by a belt Mb. The bracket 4b ismounted upon the exterior of a housing I51 and located interiorly of thehousing is a bracket [6b which carries a shaft] lb that is journaled ina bushing l8b in the upper end of the bracket [61). v

Fixed upon the shaft 11b is a spider I 91) having horizontallyprojecting arms upon which rollers 24b, 25b, 26b and 21b are mountedby-means of shouldered screws [0b. Extending around the interior rollers24b, 25b, 26b and 21b and' lying within the compass, of the exteriorrollers 81) and 9b is a flexible membrane in the formof an annular band29?), one edge of which is clamped by means of a clamping ring 3412 tothe housing 15b to form a iiuid-tight juncture therewith, the other endbeing clamped by means of a clamping ring 35b to a disk 36b which isfixed upon the inner end of the stationary shaft 22) and which, sincethe'membrane has afluid-tight juncture therewith, constitutes a part ofthe housing l5b.

In the operation of the form of the device, if the spider 5b is turnedclockwise (as seen in Fig. VIII), the cylindrical rollers 81) and 9broll about the band 29b, and as the depressions caused by the pressureof the rollers 81) and 9?) against the exterior of the band 29!) moveclockwise with wave-like motion, they push the interior rollers 25b and21b clockwise. If the spider 5b is turned counterclockwise, thewave-like movement of the depressions in the membrane band 291) push therollers 24b and 26b counterclockwise.

This form of the device will operate with a single exterior roller 8band a single pair of in terior rollers Nb and 25b, but oppositelylocated exterior rollers 8b and 9b and oppositely located pairs ofinterior rollers are preferable in order that radial thrust may becounteracted in'the spiders and not transferred to the bushings. Each ofthe spiders 5b and [9b may, if desired, be equipped with more rollersproperly proportioned to constitute a series of rollers on each spider,the two series intermeshing with each other through the membrane.

Fig. X illustrates a form of the device which may be regarded asintermediate between the form illustrated in Figs. I to IV and thatillustrated in Figs. VII to IX, the membrane 290 in the form of deviceillustrated in Fig, X being conical rather than disk-like orcylinder-like. The rollers and 9c are frustums of cones but are morenearly cylindrical than the rollers B and 9 of the mechanism illustratedin Figs. I to IV, and theoretically the main shaft bearings I20 ofspaced rolling elements, the rolling elements on opposite sides of thewall being oifset from each other angularly of the axis of said membersand having juxtaposed paths of travel the spacing between which is lessthan the thickness of said deformable wall portion, to deform the sameand provide for the transmission of rotative movement from one member tothe other through the medium of said deformable wall portion.

5. Sealed power transmitting mechanism comprising; a casing wall havingan imperforate cupshaped part provided with a tubular walled deformableportion, a driving member at one side of said wall supported forrotation about an axis substantially aligned with the axis of thetubular Walled deformable portion, a driven member at the other side ofsaid wall supported for rotation about an axis substantially inalignment with that of said driving member, a roller supported on one ofsaid members for revolution about the axis thereof and for rotationabout an axis extending generally parallel to the plane of saiddeformable portion and. having rolling engagement with one side thereof,a roller supported on the other of said members for revolution about theaxis thereof and for rotation about an axis extending generally parallelto the plane of said deformable portion and having rolling engagementwith the other side thereof, the rollers on opposite sides of the wallbeing offset from each other angularly of the axis of said members andhaving juxtaposed paths of travel the spacing between which is less thanthe thickness of said deformable wall portion, to deform the same andprovide for the transmission of rotative movement from one member to theother through the medium of said deformable wall portion.

6. Sealed power transmitting mechanism comprising; a casing wall havingan imperforate cup-shaped part provided with a tubular wall deformableportion, a driving member at one side of said wall supported forrotation about an axis substantially aligned with the axis of thetubular walled deformable portion, a driven member at the other side ofsaid wall supported for rotation about an axis substantially inalignment with that of said driving member, a pair of angularly spacedrollers supported on one of said members for revolution about the axisthereof and for rotation about axes extending generally parallel to theplane of said deformable portion and having rolling engagement with oneside thereof, a roller supported on the other of said members forrevolution about the axis thereof and for rotation about an axisextending generally parallel to the plane of said deformable portion andhaving rolling engagement with the other sidethereof between said pairof spaced rollers, the rollers on opposite sides of the wall beingoffset from each other angularly of the axis of said members and havingjuxtaposed paths of travel the spacing between which is less than thethickness of said deformable wall portion, to deform the same andprovide for the transmission of rotative movement from one member to theother through the medium of said deformable wall portion. 7

7. Mechanism for transmitting rotational movement through a wall havingan imperforate deformable portion, comprising a driving member supportedfor rotation at one side of said wall, a driven member at the oppositeside of said wall supported for rotation about an axis lying in the sameplane as the axis of said driving member, a rolling element supported onone of said members for revolution about the axis thereof and forrotation in rolling engagement with one side of said deformable wallportion on an axis generally parallel to the line of contact of saidrolling element with the surface of said deformable wall portion, arolling element supported on the other of said members for revolutionabout the axis thereof and for rotation on an axis extending generallyparallel to the axis of the first mentioned rolling element and havingrolling engagement with the other side of said deformable wall portion,the rolling elements on opposite sides of the wall being offset fromeach other angularly of the axis of said members and having juxtaposedpaths of travel the spacing between which is less than the thickness ofsaid deformable wall portion, to deform the same and provide for thetransmission of rotative movement from one member to the other throughthe medium of said deformable wall portion.

8. Mechanism for transmitting rotational movement through a wall havingan imperforate deformable portion, comprising a driving member supportedfor rotation at one side of said wall, a driven member at the oppositeside of said wall supported for rotation about an axis lying in the sameplane as the axis of said driving member, a pair of angularly spacedrolling elements supported on one of said members for revolution aboutthe axis thereof and for rotation in rolling engagement with one side ofsaid deformable wall portion on an axis generally parallel to the lineof contact of said rolling element with the surface of said deformablewall portion, a rolling element supported on the other of said membersfor revolution about the axis thereof and for rotation on an axisextending generally parallel to the axis of the first mentioned rollingelement and having rolling engagement with the other side of saiddeformable wall portion between said pair of spaced rolling elements,the rolling elements on opposite sides of the wall being offset fromeach other angularly of the axis of said members and having juxtaposedpaths of .travel the spacing between which is less than the thickness ofsaid de formable wall portion, to deform the same and provide for thetransmission of rotative movement from one member to the other throughthe medium of said deformable wall portion.

9. Sealed power transmitting mechanism comprising; a casing'wall havingan imperforate deformable portion, a driving member supported forrotation at one side of said Wall, a driven member at the opposite sideof said;wall sup ported for rotation about an axis lying in the sameplane as the axis of said driving'member, a rolling element supported onone of said members for revolution about the axisthereof and forrotation in rolling engagement with one side of said deformable wallportion on an axis generally parallel to the lineof contact of saidrolling element with the surface of said deformable wall portion, arolling element supported on the other of said members for revoportion.

p9 thi h spacin betweenewh ch eathen... the thickness of; aid;eiermable... Walla or -1,. o

iormablenwalli po t on. I 1

10; Sealed powentran mi n mechanis ;comprising;.; a. casing. wall. havinan: im artra deformable portion, a; driving-member. supportedforrzrotationatgonelside of said;-v walL; a driven member at; the:opposite Side of aid-1 Wall; 341?" posted for rotation about ans-axis rna in th sameiplane, as theaxis-lof said driving membe a: pair of.angnlarlyspaced-rolling; element supported. on. one of. said members.vfor; rev lution. about thera-xis thereof and: for rotation .in roll.-

ing. engagement-with one side oisaid deiormable wall portion on; an axisgenerallv'parall i-to th lineof contact, of: said'rolling, element with:the

surface, of said deformable; wall portion. a rolling element supportedon. the other of said members for revolution about. the axis thereofandqfor rotation on an axis extendinggenerally parallel tothe: axisof'the fi-rstimentionedirolling element andzhavine rolling engagementwith the-other i side of said; deformable wallzportion between said pairofspaced' rolling; elements, the, rollingzelements: on oppositevsideszof the. wall: being offset from each. other angularly .of: theaxisofa said members: and? having; juxtaposedtpaths: Off travelthe-spacing. between iwhichiis less than the-.thicl ness-of said.deformable: wall portion, to deform thesame and provide forthewtransmission of rotativemovement from one memberto the other throughthe: mediumbf said deformable wall 11. Sealed power transmittingmechanismcomprising; a casin wall: having an imperforate deformableportion, a driving I member supported for retation'at one: side of saidwall, a, driven member at the opposite sideof .saidiwalli sup.-portedfor rotation about: aILaXis: substantially inal'ign'ment with theaxisofisaid driving' member, a rolling element;supported on one: of-saidmembers for revolution aboutathe :axis thereof and forrotation-in-rolling engagement with one side of said deformable. wallportion on. an axis generally parallel. to the linebf contact. of saidrolling" element with the surface of said' deformable wall portion, arolling elementv supported on'the other of said members for revolutionabout the axis thereof and for rotation on anaxis extending generallyparallel to-the axis .of: the

first mentioned rolling element and havingi rollengaeement with theother side of said deformable wall portion, the rollingelemehts onopposite sides of i the wall being offset fromeach other angularly "oftheaxis of. said-members.- and having juxtaposed paths of' tr-avel the:spacing between which isless than the thickness". of: said deformablewall portion, to deform the. .same and providefor the transmission ofirot'ative movement from one member-to the; other-through the mediumofsaid deformable wall portion.

12; '-sealedpower transmittine mechanisnncomprising;-a{oasing-wallhaving animper'forate cupshaped-deformableportion, adriving member at one side ofsaid wall supportedfor rotation about anaxis substantially aligned with the axis of the deformable portion; adriven member-- at the other side of said wall supportedforrotationabout an axis substantially in alignment with; that of saiddriving member, a roller supported on one of said members for revolutionabout the axis thereof and rbr rotation in rolling engagement with} oneside ofsaiddeformable portion on anaxis-gen- 'i t i ted, generallypar-allelto the .axis of th first menerarllyiparal-lel tothe line ofcontactofsaid-roller with fthe surface of said deformable portion, aroller supported on; the; other ofsaid members forg revolution about theaxis thereof and for otat o on i -axis extending e rall ar lformable'portion, adriving member atone side of said wall supported forrotation about an axis substantially aligned with the axis of the,tubular walled deformable portion, driven member at the other sidelofsaid wall supportedfor rotation about an axis substantially in alignmentwith that of said driving member, a roller supported on one of saidmembers for revolution aboutthe axis thereof and forrotation in rollinengagement: with onesideofsaid deformable portion onan axis, nerally'.parallel to the 'axisof the deformableportion, a roller supported on theother-of said membe rs -forrevolution about. the

axis, thereof and for rotation on an axis extending generally parallelto the axis ofsaid deformable portion and having' rolling engagementwith the. other side thereof, therollers. on opposite sides. of the,wall being offset fromeach other angularly of the axis of said membersand having juxtaposed paths of travel the spacing between which is lessthan the thickness of'said deformable wall portion, to deform the sameand provide for. the, transmission of rotative movement from one member;to the other through the medium of said deformable wall portion.

- 14. Sealed power transmitting; mechanism comprising; a casing wallhaving an imperforate cqnfleshaped deformable portion, a driving memherat. oneside, ofisaid wall supported for rotation about anaxisl'substantially alignedwith the axis of the conewalled'deformable.portion, a'driven member at the other side of said walll supported forrotation. about an axis substantially in alignment with thatv ofsaid'driving member, a roller supportedonone of said members forrevolution about the axis. thereof and for rotationin rolling engagementwithone sid of said deformable portion on anaxis generally parallel tothe line of eontactof said roller with the surfacie of aid de-. formableportion, a roller supported on the other of -safid member for-revolutionabout: th axis rotation on an axisextending je i and. h vi ro n neaseentwi he. her side. oi--,' ai i e ormab e o t qn th are. aonoqs te i esf he Wall b ineofiset frqrneachother angularlyof the axis ofsaid memb rsand'ihav-i-ng juxtaposed: paths of travel the spacingibetweenwhich isless than thethiclrnessof said: deformable wall portion, .todeformthesame and. provide. for the transmission'of rotative movement from onemember to the other throughthemedium of said. deformable wall portion.1'

'1'5...Sealed. power transmitting: mechanism comprising; a casing wallhaving an imperforate 11 deformable portion, a driving member supportedfor rotation at one side of said wall, a driven member at the oppositeside of said wall supported for rotation about an axis substantiallyparallel to the axis of said driving member, a rolling element supportedon one of said members for revolution about the axis thereof and forrotation in rolling engagement with one side of said deformabl wallportion on an axis generally parallel to the line of contact of saidrolling element with the surface of said deformable wall portion, arolling element supported on the other of said members for revolutionabout the axis thereof and for rotation on an axis extending generallyparallel to the axis of the first mentioned rolling element and havingrolling engagement with the other side of said deformable wall portion,the rolling elements on opposite sides of the wall being offset fromeach other angularly of the axis of said members and havin juxtamemberto the other through the medium of said deformable wall portion.

16. Sealed power transmitting mechanism comprising; a casing wall havinga substantially flat imperforate deformable portion, a driving membersupported for rotation at one side of said wall, a driven member at theopposite side of said wall supported for rotation about an axissubstantially parallel to the axis of said driving member, a rollingelement supported on one of said members for revolution about the axisthereof and for rotation in rolling engagement with one side of saiddeformable wall portion on an axis generally parallel to the line ofcontact of said rolling element with the surface of said deform-ablewall portion, a rolling element supported on the other of said membersfor revolution about the axis thereof and for rotation on an axisextending generally parallel to the axis of the first mentioned rollingelement and having rolling engagement with the other side of saiddeformable wall portion, the rolling elements on opposite sides of theWall being offset from each other angularly of the axis of said membersand having juxtaposed paths of travel the spacing between which is lessthan the thickness of said deformable wall portion, to deform the sameand provide for the transmission of rotative movement from one member tothe other through the medium of said deformable wall portion.

1'7. Sealed power transmitting mechanism comprising; a casing wallhaving a substantially fiat imperforate deformable portion, a drivingmember supported for rotation at one side of said wall on an axisextending substantially parallel to the plane of said deformableportion,

a driven member at the opposite side of said wall support for rotationabout an axis substantially parallel to the axis of said driving member,a rolling element supported on one of said members for revolution aboutthe axis thereof and for rotation about an axis extending generallyparallel to the plane of said deformable wall portion and having rollingengagement with one side thereof, a rolling element supported on theother of said members for revolution about the axis thereof and forrotation about an axis extending generally parallel to the plane of saiddeformable wall portion and having rolling engagement with the otherside of said deformable wall portion, the rolling elements on'opposite12 sides of the wall being offset from each other angularly of the axisof said members and having 'juxtaposed paths of travel the spacingbetween which is less than the thickness of said deformable wallportion, to deformthe same and provide for the transmission of rotativemovement from one member to the other through the medium of saiddeformable wall portion. 7

18. Sealed power transmitting mechanism comprising; a casing wall havingan imperforate deformable portion, a driving member supported forrotation at one side" of said wall, a'driven member at the opposite sideof said wall'supported for rotation about an axis lying in the sameplane as the axis of said driving member and extending angularlyrelative thereto, a rolling element supported on one of said members forrevolution about the axis thereof and for rotation in rolling engagementwith one side of said-deformable wall portion on an axis general.- lyparallel to the line of contact of said rolling element with the surfaceof said deformable wall portion, a rolling element supported on theother of said members for revolution about the axis thereof and forrotation on an axis extending generally parallel to the axis of thefirst mentioned rolling element and having rolling engagement with theother side of said'deformable wall portion, the rolling elements onopposite sides of the wall being offset from each other angularly of theaxis of said members and having juxtaposed paths of travel the spacingbetween which is less than the thickness of said deformable wallportion, to deform the same and provide for the transmission of rotativemovement from one member to the other through the medium of saiddeformable wall portion.

19. Sealed power transmitting mechanism comprising; a casing wall havinga substantially flat imperforate deformable portion, a driving membersupported for rotation at one side of said wall, a driven member at theopposite side of said wall supported for rotation about an axis lying inthe same plane as the axis of said driving member and extendingangularly relative thereto, a rolling element supported on one of said,

positesides of the wall being offset from each other angularly of theaxis of said members and having, juxtaposed paths of travel the spacingbetween ,whichis less than the thickness of said deformable wallportion, to deform :the same and provide for the transmission ofrotative movement from one member to the other through the medium ofsaid deformable wall portion.

" EDWARD A. SPRIGG.

' REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Date Number Name r 2,119,955 Litton l June'l, 19382,137,303 Nelson -Nov.'22, 1938

